Valence-bond crystal phase of a frustrated spin-1/2 square-lattice antiferromagnet

Article

关键词: QUANTUM HEISENBERG ANTIFERROMAGNETS;    PEIERLS GROUND-STATES;    FINITE-SIZE;    RANGE ORDER;    WAVE THEORY;    MODEL;    DIAGRAM;   

DOI  :  10.1103/PhysRevB.54.9007

来源: SCIE

【 摘 要 】

We propose a magnetically disordered ground state for a frustrated quantum antiferromagnet. This disordered state is an array of spin singlets spontaneously formed on four spin plaquettes. Both perturbation results and bond-operator calculations show that this phase has lower energy than the columnar dimer state. Analysis of available numerical data on finite clusters also supports the conclusion that this state is realized at intermediate frustrations.

【 授权许可】

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